Ethylene tetrafluoroethylene copolymer

Ethylene tetrafluoroethylene copolymer (ETFE) is a DuPont material known by the trade name Tefzel.

Ethylene tetrafluoroethylene copolymer is a granular material and is used in processed form in electronics for coilformers, sockets, switches, and for fasteners, and also as an insulating material for cables. ETFE has a temperature resistance up to temperatures of 150°C and thus meets temperature class "D" for insulating materials. It carries the DIN/VDE designation 7Y.